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17 Cards in this Set

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Five major features for the definition of concussion
1. Blow to head
2. rapid onset of short-lived impairment of neurologic function that resolves spontaneously
3. Acute symptoms largely reflect a functional disturbance rather than a structure injury
4. Resoultion of clinical and cognitive symptoms typically follows a sequential course
5. No abnormality on imaging is seen
Why is it speculated that children are more vulnerable to concussion than adults?
1. Due to continued development of Nervous System, synapses
2. Development of skeletal system (protection)
3. Cervical soft tissue's ability to withstand energy transmitted
Substance involved with concussion in brain
Glutamate - excitatory NT that will interfere with cell communication
S/S of post-concussion syndrome
HA, fog, emotional changes, amnesia, behavioral changes, sleep disorders, altered cognition, diminished reaction time, dizziness, gait alteration.
May progress to dementia, parkinsonism, ALS, chronic traumatic encephalopathy
Extent of head injury is related to what factors?
1. amount of force
2. number of previous concussions
3. ability of anatomical structures to absorb energy
4. age
5. capability of objects involved to absorb energy
6. Protective equipment
Protective equipment and Zurich's findings
Protective equipment does not prevent concussion (includes mouth guards - but mouth guards can prevent dental/orofacial injuries)
What CNs (and how to test) after concussion
II: optic, vision
III: occulomotor: eye movement
IV: trochlear: diagnol movement
VII: fascial, control of mm
Last deficits to recover following concussion in high school athletes?
cognitive function
-3 words
-Subtract 7 from 100
-months in reverse order
What does The STandardized Assessment of Concussion (SAC) test?
orientation, immediate memory, neurological status, concentration and delayed recall of the athlete
What does the Immediate Post-Concussion Assessment and Cognitive Testing System or ImPACT test?
level of symptoms
verbal/visual memory
processing speed
reaction time (to 1/100th of a second)
attention span and time
response variability
non-verbal problem solving
Concussion rehabilitation stages
1 through 5 based on HR
Stage 1: 30-40% for 10-15 mins
STage 2: 40-60 min for 30 mins

1: no activity
2. light aerobic
3. sport specific
4: full contact
5: return to play
What is second impact syndrome?
Potentially fatal injury due to complete loss of auto-regulation of blood supply to the brain resulting in uncontrolled swelling
Best helmet for concussions
Riddell Revolution Speed
5 star crash test
Zurich: 6 stages of Graduated RTP Protocol
1. No activity
2. Light aerobic < 70% Max HR
3. Sport-specific (add movement)
4. Non-contact training drills (ex, coordination, and cognitive load)
5. Full-contact practice (restore confidence, assess functional skills by coaches)
6. RTP
Predictors of prolonged recovery after concussion?
-previous concussion
-Greater number, severity, and duration of symptoms
-youth athlete
-ADD, mood disorders, learning disorders
Balance after concussion: sensitive or specific?

Nuerophysiological testing?
More specific, meaning good balance take with a grain of salt

More sensitive
What if symptoms return during a graded RTP progression?
Stop
Restart from preceding symptom-free step